<template>
  <div>
    <!-- 面包屑导航栏 -->
    <el-breadcrumb separator=">">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区域 -->
    <el-card>
      <!-- 提示文字 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 步骤条 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
        style="margin-top: 15px"
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- 表单 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <!-- 标签页 -->
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cascaderOptions"
                @change="cascaderChange"
                clearable
                style="width: 100%"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyParamsList"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  :label="cb"
                  v-for="(cb, index) in item.attr_vals"
                  :key="index"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyParamsList"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              action="http://127.0.0.1:8888/api/private/v1/upload"
              :on-preview="picShow"
              :on-remove="picRemove"
              :headers="headersObj"
              :on-success="uploadSuccess"
              list-type="picture"
            >
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip">只能上传jpg/png文件,且不超过500kb</div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <quill-editor v-model="addForm.goods_introduce" />
            <el-button type="primary" style="margin-top: 15px" @click="addGoods"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 预览图片对话框 -->
    <el-dialog title="图片预览" :visible.sync="picVisible" width="50%">
      <img :src="picURL" width="100%" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'

export default {
  name: 'Add',
  data() {
    return {
      // 步骤索引
      activeIndex: '0',
      // 添加表单
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 分类id
        goods_cat: [],
        // 图片列表
        pics: [],
        // 商品介绍
        goods_introduce: '',
        // 参数
        attrs:[]
      },
      // 表单验证
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' },
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' },
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' },
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' },
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' },
        ],
      },
      // 商品分类
      cateList: [],
      // 级联选择框配置
      cascaderOptions: {
        expandTrigger: 'hover',
        children: 'children',
        label: 'cat_name',
        value: 'cat_id',
      },
      // 商品参数列表
      manyParamsList: [],
      // 商品属性列表
      onlyParamsList: [],
      // 图片上传请求头
      headersObj: {
        Authorization: window.sessionStorage.getItem('token'),
      },
      // 预览图片url
      picURL: '',
      // 图片预览窗口
      picVisible: false,
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    // 获取商品分类
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200)
        return this.$message.error('获取商品分类失败')
      this.cateList = res.data
    },
    // 级联选择框选项更改
    cascaderChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    // 切换tab标签前
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName == '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    // 切换tab标签触发
    tabClicked() {
      if (this.activeIndex === '1') {
        this.getManyParams()
      } else if (this.activeIndex === '2') {
        this.getOnlyParams()
      }
    },
    // 获取商品参数
    async getManyParams() {
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        { params: { sel: 'many' } }
      )
      if (res.meta.status !== 200)
        return this.$message.error('获取商品参数失败')
      res.data.forEach((item) => {
        item.attr_vals =
          item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
      })
      this.manyParamsList = res.data
    },
    // 获取商品属性
    async getOnlyParams() {
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        { params: { sel: 'only' } }
      )
      if (res.meta.status !== 200)
        return this.$message.error('获取商品参数失败')
      this.onlyParamsList = res.data
    },
    // 点击图片
    picShow(file) {
      this.picURL = file.response.data.url
      this.picVisible = true
    },
    // 图片移除
    picRemove(file) {
      const index = this.addForm.pics.findIndex((x) => {
        x.pic === file.response.data.tmp_path
      })
      this.addForm.pics.splice(index, 1)
      console.log(this.addForm.pics)
    },
    // 上传成功
    uploadSuccess(res) {
      const pic = { pic: res.data.tmp_path }
      this.addForm.pics.push(pic)
    },
    // 提交商品添加
    addGoods() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return this.$message.error('请填写所有必要项')
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')

        this.manyParamsList.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' '),
          }
          this.addForm.attrs.push(newInfo)
        })

        this.onlyParamsList.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals,
          }
          this.addForm.attrs.push(newInfo)
        })

        form.attrs = this.addForm.attrs

        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) return this.$message.error('添加商品失败')
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    },
  },
  computed: {
    // 分类id
    cateId() {
      if (this.addForm.goods_cat.length === 3) return this.addForm.goods_cat[2]
      return null
    },
  },
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 15px 10px 0px !important;
}
</style>>